<html>
<head>
    <meta charset="UTF-8">
    <title>test</title>
</head>


<body>
<p id="test">Hello World!</p>
<button type="button" onclick="selectUser()">onclick test</button>

<form action="${pageContext.request.contextPath }/user/add.do" method="post">
    username<input name="username"/> <br/>
    password<input name="password"/><br/>
    <input type="submit" value="save"/>
</form>
</body>
</html>
